US4225341A - Refining iron in a converter - Google Patents
Refining iron in a converter Download PDFInfo
- Publication number
- US4225341A US4225341A US06/024,072 US2407279A US4225341A US 4225341 A US4225341 A US 4225341A US 2407279 A US2407279 A US 2407279A US 4225341 A US4225341 A US 4225341A
- Authority
- US
- United States
- Prior art keywords
- blowing
- converter
- ducts
- tuyeres
- tipping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 6
- 238000007670 refining Methods 0.000 title claims description 5
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
Definitions
- the present invention relates to methods of refining iron, whether phosphoric or haematite iron, in a converter. It relates particularly to the case in which such refining is carried out by injecting an oxidising gas, for example pure oxygen, into the molten metal through tuyeres located in the bottom of the converter.
- an oxidising gas for example pure oxygen
- the bottom of such converters is provided with a set of tuyeres having two coaxial ducts, the central duct serving to admit the oxidising gas, whilst the peripheral duct serves to admit a protective fluid, for example a gaseous hydrocarbon, to shield the bottom from the direct action of oxygen.
- the converter After the blow, the converter is tipped into a suitable position for taking a sample, then raised and tipped in the opposite direction into a position for emptying the steel from the vessel. It is often the case that the converter remains in a vertical position for some time during this operation of raising and tipping into the emptying position. It is therefore necessary at this moment to continue blowing through the tuyeres in order to prevent them becoming blocked with the liquid steel in the converter.
- the present invention provides a refining method in which a steel works converter whose base is provided with a set of tuyeres having two coaxial ducts is used, and in which, during the operation for moving the converter into the emptying position, following its tipped positioning for sampling, a gas substantially consisting of CO 2 is blown through the ducts of the tuyeres.
- This CO 2 injection may also be carried out after any corrective blowing operation carried out directly after the actual blow; this corrective blowing operaton also requires the converter to be tipped up for sampling, and is also characterised in that a strongly oxidising gas is blown through the central duct of each tuyere and a protective fluid, such as a hydrocarbon, is blown through the peripheral duct.
- the corrective blowing step is combined with the CO 2 blowing step mentioned above.
- the corrective blow e.g. from the beginning of the righting of the converter up to its emptying position
- all or part of the hydrocarbon blown through the peripheral ducts of the tuyeres is replaced by CO 2 , whilst continuing to blow a strongly oxidising gas through the central ducts of the tuyeres, this operation therefore only being followed by emptying of the converter. It has also been observed that such a method also enables a considerable reduction of the hydrogen and nitrogen contents of the steel to be achieved without additional cost.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE865462 | 1978-03-29 | ||
| BE646750 | 1979-02-02 | ||
| BE6046750A BE873920A (fr) | 1979-02-02 | 1979-02-02 | Perfectionnements aux procede d'affinage de fonte au convertisseur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4225341A true US4225341A (en) | 1980-09-30 |
Family
ID=3874812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/024,072 Expired - Lifetime US4225341A (en) | 1978-03-29 | 1979-03-26 | Refining iron in a converter |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4225341A (enrdf_load_stackoverflow) |
| BE (1) | BE873920A (enrdf_load_stackoverflow) |
| FR (1) | FR2421217A1 (enrdf_load_stackoverflow) |
| LU (1) | LU81051A1 (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139569A (en) * | 1989-04-13 | 1992-08-18 | Messer Griesheim | Process for the production of alloy steel grades using treatment gas consisting of CO2 |
| US5710088A (en) * | 1995-06-30 | 1998-01-20 | Ford Global Technologies, Inc. | Lean-NOx catalysts containing silver supported on alumina |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3330645A (en) * | 1962-08-07 | 1967-07-11 | Air Liquide | Method and article for the injection of fluids into hot molten metal |
| GB1253581A (en) * | 1968-02-24 | 1971-11-17 | Maximilianshuette Eisenwerk | Improvements in processes and apparatus for making steel |
| US3779534A (en) * | 1969-07-08 | 1973-12-18 | Creusot Loire | Device for cooling a tuyere of a refining converter |
| GB1451013A (en) * | 1973-06-18 | 1976-09-29 | Allegheny Ludlum Ind Inc | Process for production of stainless steel |
| GB1451847A (en) * | 1973-09-13 | 1976-10-06 | Baum Verfahrenstechnik | Method and equipment for operating bottom blast converters |
-
1979
- 1979-02-02 BE BE6046750A patent/BE873920A/xx not_active IP Right Cessation
- 1979-03-15 LU LU81051A patent/LU81051A1/xx unknown
- 1979-03-19 FR FR7907703A patent/FR2421217A1/fr active Granted
- 1979-03-26 US US06/024,072 patent/US4225341A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3330645A (en) * | 1962-08-07 | 1967-07-11 | Air Liquide | Method and article for the injection of fluids into hot molten metal |
| GB1253581A (en) * | 1968-02-24 | 1971-11-17 | Maximilianshuette Eisenwerk | Improvements in processes and apparatus for making steel |
| US3706549A (en) * | 1968-02-24 | 1972-12-19 | Maximilianshuette Eisenwerk | Method for refining pig-iron into steel |
| US3779534A (en) * | 1969-07-08 | 1973-12-18 | Creusot Loire | Device for cooling a tuyere of a refining converter |
| GB1451013A (en) * | 1973-06-18 | 1976-09-29 | Allegheny Ludlum Ind Inc | Process for production of stainless steel |
| GB1451847A (en) * | 1973-09-13 | 1976-10-06 | Baum Verfahrenstechnik | Method and equipment for operating bottom blast converters |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139569A (en) * | 1989-04-13 | 1992-08-18 | Messer Griesheim | Process for the production of alloy steel grades using treatment gas consisting of CO2 |
| US5710088A (en) * | 1995-06-30 | 1998-01-20 | Ford Global Technologies, Inc. | Lean-NOx catalysts containing silver supported on alumina |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2421217B3 (enrdf_load_stackoverflow) | 1982-11-05 |
| FR2421217A1 (fr) | 1979-10-26 |
| BE873920A (fr) | 1979-05-29 |
| LU81051A1 (fr) | 1979-06-19 |
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